Archived posting to the Leica Users Group, 2002/06/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Greetings Mark, Obviously I agree with you that Xtol is a wonderful invention as it is currently all I use. And with the exception of fine tuning times and agitation I pretty much find the processes in Anchell and Troop to be pretty accurate. What is known is that Xtol loves oxygen and will deteriate very rapidly if exposed for any period of time. We strongly suspect that water quality plays an important part in the activity of Xtol. From my experience I believe that mixing in hot water will deteriate the developer, I suspect that people use hot water to dissolve part A and the solution is still hot(double activity for every ten degrees F over 68) when they add part B reducing the activity of the developer. In summary, I think that this is a modern age wonder that needs to be treated with care: no oxygen, as little heat as possible, distilled water or heavily filtered water including charcoal to mix, and some knowledge of just how dilute it can be and not go into exhaustion. Regards, Don dorysrus@mindspring.com - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html